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acronym for the colors of the rainbow (visible spectrum): Red, Orange, Yellow, Green, Blue, Indigo and Violet in order from LONGEST to SHORTEST

13. convex (convexo)

a surface that is curved outward (light waves become focused)

14. concave (cóncavo)

a surface that is curved inward (light waves are spread out)

15. lens (lente)

a curved piece of transparent material used to refract light

16. mirror (espejo)

a smooth, very reflective surface, reflected images are reversed

17. absorb (absorba)

to take in or swallow up (rather than transmit or reflect)

18. transmit (transmita)

to go through

19. X-rays, radio waves, microwaves, gamma rays, etc.

energy on the electromagnetic spectrum that humans can not see - perhaps Superman can!

20. prism (prisma)

A triangular shape lens that refracts white light in to its component part - ROYGBIV, the visible spectrum or colors of the rainbow - rains drops can act like prism and create rainbows (but not pots of gold!)

21. Sir Issac Newton

Proved white light was actually all the colors of the spectrum, coined the term spectrum meaning ghostly image - he lived in the mid 1600's and early 1700's and was a member of the Royal Society

22. Galileo

The first person to use a telescope to study astronomy in depth - he supported the theory that the sun is the center of our solar system and therefore was placed under house arrest by the Church

23. Anton Van Leeuwenhoek

A Dutch man that ground lenses as hobby (he was a haberdasher) made the first useable microscope - first to see single cells organisms - joined the Royal Society

24. Robert Hooke

Using a microscope he described "little boxes" or cells

25. Particle and Wave Models

Two models of light scientists use to explain its properties, characteristics, and behaviors